Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a média do ERP W para o indicativo K207BK?
 ###Tabelas: CREATE TABLE summary_of_qualification (summary_of_qualification_id AUTO_INCREMENT PRIMARY KEY, Confederation VARCHAR, Teams started VARCHAR, Teams that have secured qualification VARCHAR, Teams that can still qualify VARCHAR, Teams that have been eliminated VARCHAR, Remaining places in finals VARCHAR, Total places in finals VARCHAR, Qualifying start date VARCHAR, Qualifying end date VARCHAR) CREATE TABLE king’s_commissioners (king’s_commissioners_id AUTO_INCREMENT PRIMARY KEY, Province VARCHAR, Commissioner VARCHAR, Assumed office VARCHAR, Duration VARCHAR, Party VARCHAR, Born VARCHAR) CREATE TABLE season_4:_2004 (season_4:_2004_id AUTO_INCREMENT PRIMARY KEY, Series Ep. VARCHAR, Episode INT, Netflix VARCHAR, Segment A VARCHAR, Segment B VARCHAR, Segment C VARCHAR, Segment D VARCHAR) CREATE TABLE translators (translators_id AUTO_INCREMENT PRIMARY KEY, Call sign VARCHAR, Frequency MHz INT, City of license VARCHAR, ERP W INT, Class VARCHAR, FCC info VARCHAR) CREATE TABLE fall_2001 (fall_2001_id AUTO_INCREMENT PRIMARY KEY, 7:00 am VARCHAR, 9:00 am VARCHAR, 10:00 am VARCHAR, 11:00 am VARCHAR, noon VARCHAR, 12:30 pm VARCHAR, 1:00 pm VARCHAR, 1:30 pm VARCHAR, 2:00 pm VARCHAR, 2:30 pm VARCHAR, 3:30 pm VARCHAR, 4:30 pm VARCHAR, 5:00 pm VARCHAR, 6:30 pm VARCHAR)  
SELECT AVG ERP W FROM translators WHERE Call sign = k207bk